Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
The official home of the Python Programming Language
C语言中文网是中国领先的C语言程序设计专业网站，提供C语言入门经典教程、C语言编译器、C语言函数手册，C语言编程技巧，C语言考试试题等，是学习、自学C语言程序设计的好帮手。
GitHub is where over 83 million developers shape the future of software, together. Contribute to the open source community, manage your Git repositories, review code like a pro, track bugs and features, power your CI/CD and DevOps workflows, and secure code before you commit it.
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识别图片中的公式！免费的在线LaTeX公式编辑器。支持导出svg、超大png、jpg、MathML、SVGCode。可以打出任何公式，不只是数学！支持物理physics、化学mhchem、unicode等常用扩展宏包加载。即时渲染，基于MathJax实现。
An online LaTeX editor that’s easy to use. No installation, real-time collaboration, version control, hundreds of LaTeX templates, and more.
本站提供JSON在线格式化校验、加密解密、代码格式化、在线转换、图片处理等在线工具。
Online GDB is online compiler and debugger for C/C++. You can compile, run and debug code with gdb online. Using gcc/g++ as compiler and gdb as debugger. Currently C and C++ languages are supported.
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Javascript Obfuscator - Protects JavaScript code from stealing and shrinks size - 100% Free
This is, quite possibly, the best computer automated card trick on the Internet.
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Interactive Open Source Numerical Library of C/C++ functions for Engineering, Finance, Maths, Science and Statistics. With Online Calculators for Numerical Components and Excel Add-ins.
GeoGebra - the world’s favorite, free math tools used by over 100 million students and teachers
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Codeforces. Programming competitions and contests, programming community
AtCoder is a programming contest site for anyone from beginners to experts. We hold weekly programming contests online.
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TypeScript extends JavaScript by adding types to the language. TypeScript speeds up your development experience by catching errors and providing fixes before you even run your code.
现代 JavaScript 教程：有关示例和任务的简单但详细的解释包括：闭包、文档和事件，以及面向对象编程等。
The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps.
